Hollow ion spectra in warm dense laser-produced plasma; Observation and modeling

レーザーで生成されたwarm dense plasmaにおける中空イオンスペクトル; 観測とモデル化

Faenov, A. Ya.; Pikuz, T. A.*; Skobelev, I. Yu.*; 福田 祐仁; Colgan, J.*; Abdallah, J. Jr.*

Faenov, A. Ya.; Pikuz, T. A.*; Skobelev, I. Yu.*; Fukuda, Yuji; Colgan, J.*; Abdallah, J. Jr.*

The role of the highly charged hollow ions in the X-ray emission plasma spectra is investigated for 2 cases: (1) plasma obtained under irradiation of Ar clusters by ultrashort laser pulses and (2) Mg-plasma heated by a short-wavelength long (nanosecond) laser pulse. Experimental measurements are presented. Calculations in support of these measurements have been performed using a detailed atomic kinetics model with the ion distributions found from solution of the time-dependent rate equations. The calculations are in good agreement with the measurements and the role of hollow atoms in the resulting complicated spectra is analyzed.